Safety-lock



W. KOZIOL.

SAFETY LOCK.

APPLICATION FILED R. 26, um.

Patented July 12, 1921.

2 SHEETS-SHEET I.

A I /6 5 FE 111.1...

%I l/V VIE/11% W. KOZIOL.

SAFETY LOCK.

APPLICATION m0 MAR. 26. I921. 1,384,723. Pat nted July 12, 1921.

2 S.HEETSSHEET 2.

mm IH IIWIHWI WW I I 11 I INVENTOR UNITED "STATES PATENT OFFICE.

WILLIAM KOZTOL, OF EAST-HAMPTON, MASSACHUSETTS.

SAFETY-LO CK.

To all/whom it may concern Be it known that 1, -WILLIAM KozIoL, a citizen of Poland, residing at Easthampton, in the county of Hampshire and State of Massachusetts, have invented certain new and useful Improvements in Safety-Locks, of which the following is a specification.

The principal purpose of this invention is to produce a lock of the type commonly applied to swinging doors for securing them in closed position, the lock being provided with means for automatically sounding an audible signal if attempts be made to tamper with the. same unauthorizedly.

. A further object is to provide means combined with the lock which prevent an alarm being given when actuated "by persons familiar with its peculiarities, a switch being provided for engaging or disengaging the sound signal device, the switch being o-per ated from the inner side of the door.

. Further objects, such as effective protection against unwarranted intrusion, cheapness of construction and neatness of appearance, are attained by the novel construction, combination and arrangement of parts hereinafter describedand shown in the accompanying drawings, forming a material part of this disclosure, and in which Figure 1 is a plan view of a lock made in accordance with the invention, the cover being broken away to disclose the construction. r

Fig. 2is a transverse sectional view taken on line 2-2 of Fig. 1. I

Fig. 3, is a perspective view of the alarm controlling slide. 1 I

Fig. 4 isa similar one of the lock'bolt.

Fig. 5 is a front elevational view of the lock, part being broken away showing a portion of the interior.

f Fig. 6 isa plan view similar to Fig. 1 but showing the parts in' another position.

Fig. 7 is a fragmentary plan view of the alarm switch. I

Fig. 8 is a fragmentary view of. the key used in connection with the lock. Fig. 9 is a view showing'the application ofthe look. I

Fig. 10 is a detail plan view of the lock levers in operative position.

Stated in brief general terms, the lock same by the wards of the keys.

' Specification of Letters Patent. Patented J 1y 12 1921 Application filed March 26, 1921. Serial No. 455,965.

comprises the usual casing containing a key actuated sliding bolt together with its locking levers.

' A bell and spring actuated hammer is also located in the casing, the same having an escapement by which a continuous ringing may be obtained when a key is entered and turned 1n the lock, provided the alarm controlling switch is set to permit the same,

vthus giving audible warning of an attempt ed entrance.

Referring now 'mo-re particularly to the head at one side. Y

A recess 22 is formed in theopposite edge of the bolt body, beyond which is a lug 23 and opposite the lug is an angular recess 24 into which the wards of the key enter as will further on become apparent.

The lock bol-t levers 25, 26 and 27, respectively upper, intermediate and lower are pivoted at their forward ends on the screw 18, their wider rear portions containing ap proximately H shaped recesses into which extend lugs from both sides engageable with the lugs 23'unless positioned to clear the These several levers are each ently normally pressed in the direction of the key by springs 33 set in slits in the levers at one end, partially encircling the pivot screw '18 and bearing against an abutment 34' fixedin the casing.

Positioned transversely below the bolt body 20 is a slide 35'held by screws 36 passing through'slots 37 near the ends at one side, the screws limiting the movement of independthe slide which is held in position by a flat tension spring 38, fixed at one end in the casing and curved at the other into a detent 39 engageable in either of the recesses 40 in the edge of the slide.

The key, which is of the usual character,

' comprises a stem 42 having a reduced end 43 from which extends a plate bearing a pair of oppositely extending Wards 44, parallel with the stem and a pair of spaced projecting wards 45, the latter being adapted to V actuate the bolt levers as the key is turned and also to move the bolt into locked or unlocked position, while the inner ward 44 passes over the slide 35 without moving the same, as would occur by the use of an ordinai' y door key. 7

ounted to extend through the cover plate 16 is a spindle 48, its squared extending shank 49 being adapted to receive a windingpkey and secured to the spindleis the inner end of a spiral spring 50, the outerend of which is fixed to the casing.

Secured to the spindle 48 is a ratchet wheel '51 engaged by a spring pressed pawl 52'pivoted on the side of a gear 53 loosely mounted on the spindle, this gear meshing with a pinion 54 fixed on a stud 55 to which is also attached an escapement wheel 56 so that the latter may be rotated by action of the gear 53 and the spring which obviously iscapable of being wound by a key applied to the squared end 49 of the spindle 48.

Pivoted on another stud 58 is an escapement fork 59 engaging the teeth of the wheel 56," permitting the passage of one of its teeth at each oscillation of the fork in a well known manner, and carried' by the fork is an arm 60 having at its outer end a hammer 61.

Also engaging the arm 60 is a detent 62 formed with the slide 35'and which when in the position shown in Fig. 1 prevents movement of the escapement, but when as shown in Fig. 6 allows the arm 60.to be actuated by the spring therein;

A bell 65 ofthe usual type is fixed rigidly .on a post 66 set in'the lock casing and so positioned that the hammer 61 can make con tact with it'when actuated. 7

It will now be seen that if an ordinary key be entered and turned in the lock the one end, as at 69.

A pair of spaced projections 70 are formed with the casing wall and equi-distant from the axisi49 of the spring;50,so that as its outer coil makes contact with the spring 68 it isdefiected causing the free end171 to move inwardl V y Attac ed to the sprin end 71 is a rod 72 extending along the a jacent' wall of the casing and attached at its opposite end to a block 74 slidable against the casing wall parallel tothe lock bolt.

'A rod 75 mounted to slide in brackets 76 fixed in the casing, is offset .atits end adjacent the lock bolt and fixed-to the offset end is a block 77 adapted to engage the bolt body 20 at-a point adjacent its head, as shown in Fig. 1, when the rod ispressed against it i by the coiled compression spring 78 encircling the rod between the bearings 76.

The block is -normally held out of contact, as shownin Fig. 6, by a latch 80 pivoted at 81 to the cover plate 16, this "latch having a-notch 82 engageable with the angularly turned end 83 ofthe rod 75, this angle end extending through a slot 84 in the casing plate'and being provided with a. knob by which itvis maneuvered. V I

Means for moving the latch manually .are provided in the pull 86 fixed in the' plate and extending along the upper surface ofthe cover plate 16. Then the block 77. is in a downward position 'it is held by :the rod 83 entering a recess 87'in-thelcorner of the Now if thespring 50 becomes slackened or unwound sufiiciently to bend'o'r deflect the spring 71, the rod 72. and block 741are' pro jected forward and pass between'the wall of thevcasing 'and the anglerod 83, then in a downward position, forcing theblock'77 against the lock bolt. 20 as in Fig.- 1 and preventing its retraction'by the .use ofa k'ey.

Thus if the alarmshould failto bring a person to the door the lock wiu'aa respond to the insertion and operation of'a' key under I any circumstances. 7

However an operator from the inner side of the door can, by swinging the latch, hold the block 77 out of engagement,=a condition not presumed to be known to intruders, who th'us fail to openpthe door. I

The disclosure is to be regarded asdescriptive only and not as restrictive or limitative of the invention, of whichobviously .110 an embodiment may be constructed includ ing many minor modifications without. de-" parting from the general scope hereinindicated and hereafter claimed. 7

While 'in the foregoing there has. been shown and describedthe preferred embodiment of this invention,.-it is to be understood that certain minor changes, in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope oi? the invention as claimed. I

'Iclaim m a 1. A lock'comprising a casing, a keyactw ated bolt slidable therein, a bell-and spring actuated hammer therefor, a detent forsai'd hammer 'releasable by the lock key, and means preventing'the retraction of said bolt,

said means becoming operative upon the means for preventing the retraction of said slackening of the hammer actuating means. bolt, said means becoming operative upon 10 2. A look comprising a casing, a sliding the expansion of the alarm actuating means.

bplt and means for actuating Eaid bolt, an In witness whereof I afiix my signature.

a arm in sai casing, a spring or actuating said alarm, means for controlling the opera- WILLIAM KOZIOL' tion of said spring, said means becoming op- Witness:

erative upon the use of a spurious key, and MICHAEL T. OBRmN. 

